/*
    GNU GENERAL LICENSE
    Copyright (C) 2006 The Lobo Project. Copyright (C) 2014 - 2017 Lobo Evolution

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public
    License as published by the Free Software Foundation; either
    verion 3 of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General License for more details.

    You should have received a copy of the GNU General Public
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
    

    Contact info: lobochief@users.sourceforge.net; ivan.difrancesco@yahoo.it
 */
package org.lobobrowser.primary.ext;

import java.awt.BorderLayout;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.text.Document;

import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.fife.ui.rsyntaxtextarea.RSyntaxTextArea;
import org.fife.ui.rsyntaxtextarea.SyntaxConstants;
import org.fife.ui.rtextarea.RTextScrollPane;
import org.lobobrowser.ua.NavigatorWindow;

/**
 * The Class SourceViewerWindow.
 */
public class SourceViewerWindow extends JFrame {
	
	 /** The Constant logger. */
    private static final Logger logger = LogManager.getLogger(SourceViewerWindow.class);

	/** The Constant serialVersionUID. */
	private static final long serialVersionUID = 1L;

	/** The text area. */
	private RSyntaxTextArea textArea;
	
	/** The scroll bar. */
	private RTextScrollPane scrollBar;

	/** The jtf filter. */
	private JTextField jtfFilter;

	/** The find bsutton. */
	private JButton findButton;
	
	/** The pos. */
	private int pos = 0;
	
	/**
	 * Instantiates a new text viewer window.
	 */
	public SourceViewerWindow(NavigatorWindow window) {
		super("Lobo Source Viewer");
		setResizable(true);
		setLocationRelativeTo(null);
		setIconImage(new ImageIcon(getClass().getResource("/org/lobobrowser/images/icon.png")).getImage());
		setVisible(true);
		addTextArea();

	}

	private void addTextArea() {
		jtfFilter = new JTextField();
		findButton = new JButton("Next word");
		textArea = new RSyntaxTextArea();
		textArea.setHighlightCurrentLine(true);
		textArea.setAnimateBracketMatching(true);
		textArea.setAntiAliasingEnabled(true);
		textArea.setEditable(false);
		textArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_XML);

		scrollBar = new RTextScrollPane(textArea);
		scrollBar.setBorder(null);
		scrollBar.setLineNumbersEnabled(true);
		scrollBar.setViewportView(textArea);

		this.getContentPane().add(scrollBar);

		JPanel panel = new JPanel(new BorderLayout());
		panel.add(new JLabel("Specify a word to match:"), BorderLayout.WEST);
		panel.add(jtfFilter, BorderLayout.CENTER);
		panel.add(findButton, BorderLayout.EAST);
		add(panel, BorderLayout.SOUTH);
		
		findButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				String find = jtfFilter.getText().toLowerCase();
				textArea.requestFocusInWindow();
				if (find != null && find.length() > 0) {
					Document document = textArea.getDocument();
					int findLength = find.length();
					try {
						boolean found = false;
						if (pos + findLength > document.getLength()) {
							pos = 0;
						}
						while (pos + findLength <= document.getLength()) {
							String match = document.getText(pos, findLength).toLowerCase();
							if (match.equals(find)) {
								found = true;
								break;
							}
							pos++;
						}
						if (found) {
							Rectangle viewRect = textArea.modelToView(pos);
							textArea.scrollRectToVisible(viewRect);
							textArea.setCaretPosition(pos + findLength);
							textArea.moveCaretPosition(pos);
							pos += findLength;
						}

					} catch (Exception exp) {
						logger.log(Level.ERROR, exp);
					}

				}
			}
		});
	}

	/**
	 * Sets the text.
	 *
	 * @param text
	 *            the new text
	 */
	public void setText(String text) {
		this.textArea.setText(text);
	}
}